If you’re sizing up the 40 mm 1K half pin cylinder, what you’re really looking at is a no‑nonsense mechanical lock core built around a simple pin tumbler setup — that’s the guts that actually keeps the door shut until the right key turns it.

This satin steel high security lock cylinder doesn’t brag with fancy electronics or gadgets; it’s purely mechanical steel and pins doing its job, and that matters a lot on a job site where reliability counts more than bells and whistles.

Key Features:

• 40 mm Cylinder Length - Compact size that works with narrow doors and particular lock housings.
• Half Pin Configuration - One side keyed, the other dead — handy for keyed access from only one side.
• Satin Steel Finish - Harder to scratch up than cheap chrome, plus it won’t blind you in bright sun.
• Pin Tumbler Mechanism - Classic pin‑and‑shear design means familiar, field‑serviceable lock tech.
• High Security Label - Not just a tag — this type is meant to resist basic picking and unauthorized keying better than cheap bushes of pins.

Applications

This high security lock cylinder likes being in external and internal doors where you only need one side keyed — think storerooms, back doors, service doors, and utility closets — and it’s more secure than a slab deadbolt without a cylinder.

Why Choose This Model

The bottom line is this piece isn’t some throw‑away cheapie — you get a tried‑and‑true pin tumbler setup, decent satin steel finish, and a cylinder that’ll fit most standard mortise bodies that call for a 40 mm half unit. In practice, that means fewer call‑backs for busted hardware and far fewer complaints from the crew.

Technical Specifications Explained

• Cylinder Length – 40 mm - Fits flush into a lot of doors without sticking out or jamming up with trim.
• Material – Satin Steel - Holds up to abrasion, doesn’t oxidize as fast as untreated steel.
• Mechanism – Pin Tumbler - Standard, proven locking method that locksmiths can service on site.
• Half Cylinder Type - Key access on one side only, which can be safer for certain layouts.
• 1K Keying - Single key variation, so no master key system clutter unless re‑pinned.

Who Should Buy This

If you’re putting in a 40 mm 1K half pin cylinder because you need a straightforward, no‑nonsense lock cylinder for renovation or new builds where access control from one side is essential — this is your pick. It’s especially solid for builders, maintenance crews, and commercial fit‑outs where cut‑and‑dry performance beats fancy fluff.

Don’t buy this if you want a double‑sided keyed or thumb‑turn setup — go for a different cylinder style instead.